Dental forceps.



B. PELDMAN.

DENTAL FORGEPS.

APPLIOATION FILED s112137, 1912.

1,060,242., Patented Apr.29,1913.

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B. FELDMAN.

DENTAL FORGEPVS. APPLICATION FILED SEPT. 7, 1912'.

l ,060,242, Patented A111229, 1913.

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0 I Y I WITNESSES Fw E Allorney l panying drawings,

BERNARD FELDMAN, 'OF PERTE AMBOY, NEW' JERSEY.

DENTAL FORCEPS.

Specification of Letters Patent.

Patented Apr. 29,1913.

Application filed September 7, 1912, Serial No. 719,195.

T0 all froh-0m t may concern:

Be it known that I, BERNARD FELDMAN, a citizen of the United States,residing at Perth Amboy, in the county of Middlesex and State of NewJersey, have invented certain new and useful Improvements in DentalForceps; and do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to the letters and figuresof reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in dental forcepsadapted for use for the ready extraction of teeth from the human oranimal mouth, and the object in view is to produce a device of this character whereby the pull or the jerk employed by the operator in the actof drawing the teeth may be eliminated.

In the extraction of teeth by my improved forceps the compression of thehandles toward each other will have the tendency to cause t-he curvedbeaks to have a slight longitudinal movement causing the jaws thereof togrip the teeth securely and dislodge the tooth from its socket, thusmaterially aiding the extract-ion of the tooth.

More specifically, the present invention comprehends the employment ofcam actuating means, so arranged that when the handles of the forceps,which are pivoted together are moved toward each other, the action ofcams will be exerted to forcefully move the beaks in contact with thetooth and exert a pulling force thereon gradually dislodging the root ofthe tooth from the cavity of the jaw,

My invent-ion is illustrated in the accomin which Figure l is a verticalsectional view of the forceps embodying my invention, por-.

tions of the invention being in a side elevation. Fig. 2 is a sectionalview on line- 2 2. Fig. 3 is a detailed view of a cam forming a part ofthe invention. Fig. l is a side elevation showing a slight modificationof the invention. Fig. 5 is a view similar to Fig. .4, showing the beaksdrawn toward each other. Fig. 6 is a detail view of one of the beaks.Fig. 7 is a sectional view on line 3*?) of Fig. 4. Fig. 8 is a sectionalview on line 4-4 of Fig. 4. Fig. 9 is an inner through j and adapted toengage a similar shaped recess in the outer face of one of t-he handles,while at its other end said pin is pivoted with a lug which, when thepin is adjusted in place, is adapted to pass through a recess (not shownin Figs. 1 and 2 of the drawings) but in the manner shown in Fig..

5, and after the pin has been given a par* tial rotary movement said lugQ3 will serve to hold the two handles fastened together. Each handleabove its pivotal point is provided with a socket M2, and in one of saidsockets is mounted to have a slight longitudinal movement a beak Opreferably curved as shown, and the wall of the socket in which the beakis mounted is curved to conform to the curvature of the beak therein.The other socket is provided with a similar beak P. The inner end of thebeak is provided with a threaded hole for the reception of a screw O,having a head carrying a pin O3 to which one end of the wire O2 ispivotally connected. The beak P also has a similar screw P fitted in theinner end thereof and a pin P2 forms a means for pivotally connectingthe latter with a wire P3. Each of the shank portions of the handleabout the pivotal portions thereof is recessed, as .shown clearly inFig. 2 of the drawings, and two disks G and G each having a cam edge,are mounted one in each of said recesses with their inner adjacent facesin contact with each other. It will be noted that the two wires O2 andP3 engage each a cam edge of one of said disks. A pin Q passes throughthe wall of the recessed portion of the handle Vl and also an aperture gin the disk Gr and serves to hold the latter in place, while a pin Q2,shown in Fig. 2 of the drawings, passes through the other handle and isadapted to engage and hold the disk Gr. Corresponding ends of the wiresO2 and P3 are fastened respectively to the pins O5 and O projectingrespectively from the lugs 06 and O. rlhe lug O6 is provided with acontracted threaded portion adapted to receive an open ended shell O7,which telescopes vE similar in construction to the pin Q beforedescribed and which pin is provided with a lug F and has a squared end Eengaging an angular outlined recess formed in the outer face of the headC which is integral with the handle 8. Said lug F is adapted when inregistration with recesses formed in the heads C and B, to allow the pinE to be passed through the two handles to pivot the same together. Saidheads are recessed for the reception of the disks I and H, the former ofwhich is provided with a cam slot J, shown clearly in Fig. 9 of thedrawings, and said disk I is provided with a slot I2 for the receptionof the contracted shank portion R of the beak R, a detail view of saidshank R being shown in Fig. 6 of the drawings and which is provided witha laterally extending portion S adapted for engagement with a cam slot Nvformed in the disk H, and shown in dotted lines in Fig. 10 of thedrawings.

The two beaks T and R illustrated in Figs. 4: and 5 are identical inconstruct-ion'and each is mounted to have a sliding movement in achannel formed in the inner face of the head in which it is mounted. Thebeak T has a shank portion T with an angled end T2 and said shankportion T2 moves in a groove formed in a channel T3 formed in the innerface of the head B and is movable in a slot T formed in the disk H. Aretainer pin K passes through the vwall of the head B and engages thedisk H, as shown in Fig. 7 of the drawings while a similar pin L passesthrough the head C and engages the disk I. y

In operation, referring to the form shown in Figs. 1 to 3 inclusive,when the two handles are compressed by the operator gripping the two inhis hand, the disks each moving with its particular handle will causethe cam edges to fulcrum against the wires causing the beaks to be drawnslight distances into the sockets in which they are mounted, thustending to draw the outer tooth engaging ends thereof in contact withthe tooth to be extracted. As the handles approach each other the beakswill be exerting a pulling effect upon the tooth and thegreater'pressure applied to the handles the greater .will be the@ripping force upon the tooth to be extracte In the modified forms shownin Figs. 4

to 10 the movement of the beaks is similar to that before described andas illust-rated in Fig. 1 excepting that the wires which are connectedto the beaks, are dispensed with and the action of the beaks is affectedthrough the medium of the angled inner ends of the shank port-ionsthereof engaging the cam slots in the disks H and I and which will tend,as the handles nare compressed by the hands of the operator, to causethe two beaks to be drawn into the channels and slots provided thereforin the heads of the handles and disks H and I, whereas when the handlesare separated, a reverse outer longitudinal movement will be imparted tothe beaks returning the same to normal open positions, as shown in Fig.4 of the drawings.

From the foregoing it will be noted that by the provision of forcepsmade in accordance with my invention the beaks, when shoved into thegums and about the tooth, in order to obtain a rm gripping o-r hold uponthe tooth to be extracted will, when the handles are brought underpressure toward each other, be forced to grip the tooth, and upon afurther pressure being applied to the handle, an inner longitudinalmovement will be imparted to each beak and which will be sufficient todislodge the tooth from its socket, thus materially aiding in theextraction of the tooth and thereby eliminating the usual pull or jerkincident to extracting teeth by the ordinary forceps commonly used.

What I claim to be new is:

l. Dental forceps comprising two handles which are pivoted together, abeak movable upon each handle and actuating means for causing the beaksto move longitudinally by the bringing of the handles together, as setfort-h.

2. Dental forceps comprising two handles which are pivoted together, theend of each handle having a socket formed therein, a beak movable withineach socket, and cam actuating means connected to each of said beaks andadapted, as the handles are forced toward each other to cause an innerlongitudinal movement to be imparted to each beak, as set forth.

3. Dental forceps comprising two handles .which are pivoted together,the end of each handle having a socket formed therein, a beak movablewithin each socket, wires fastened to the inner ends of the beak and tothe handle in which the beak is mounted and cam disks mounted upon thehandles and adapted as the latter are moved toward each other to causean inner longitudinal movement to be imparted to said beaks, as setforth.

4. Dental forceps comprising two handles which are pivoted together, theend of each handle having a socket formed therein, a

beak movable within each socket, wires vfastened to the inner ends ofthe beaks and to the handles in which the beaks are mounted, each handlehaving a recess in the inner face thereof, a disk seated in the recessand having a cam edge against which one of said wires is adapted tofulcrum, and affording means whereby as the handles are moved towardeach other an inner longitudinal movement will be imparted to the beaks,as set forth.

5. Dental forceps comprising two handles which are pivoted together, oneend of each handle having a socket formed therein, a beak movable withineach socket, the inner end of the beak having a threaded hole therein, ascrew fitted in said hole, a wire pivoted to each screw and fastened tothe handle carrying said beak, each handle having a recess in its innerface, a disk seated in each of said recesses and each disk provided witha cam edge against which one of said wires is adapted to fulcrum.

6. Dental forceps comprising two handles which are pivoted together, theend of each handle having a socket formed therein, walls of which arecurved, a curved beak movable within each socket, open ended shellsfastened one to the inner edge of each handle, a threaded plug iitted ineach shell and to which said wires are pivotally connected, a springbearing between said plugs, and disks carried one by each handle andhaving a cam edge against which said wires are adapted to fulcrum, asset forth.

In testimony whereof I hereunto afiX my signature in the presence of twowitnesses.

BERNARD FELDMAN.

Witnesses:

HYMAN FRIEDMAN, LOUIS Y. LOUIS.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents Washington, D. C.

